switch to ava

.gitignore

@@ -1 +1,2 @@
 node_modules/
+package-lock.json

package.json

@@ -4,7 +4,7 @@
   "description": "Human readable time measurements",
   "main": "index.js",
   "scripts": {
-    "test": "mocha"
+    "test": "ava"
   },
   "repository": {
     "type": "git",
@@ -21,7 +21,6 @@
     "url": "https://github.com/rschmukler/human-interval/issues"
   },
   "devDependencies": {
-    "expect.js": "~0.3.1",
-    "mocha": "~3.4.2"
+    "ava": "^0.23.0"
   }
 }

test.js

@@ -0,0 +1,23 @@
+const test = require('ava');
+const humanInterval = require('.');
+
+const macro = (t, inputs, expected) => {
+    inputs = Array.isArray(inputs) ? inputs : [inputs];
+    inputs.forEach(input => t.is(humanInterval(input), expected));
+};
+
+test('returns the number when given a number', macro, 5000, 5000);
+test('returns undefined when given undefined', macro, undefined, undefined);
+test('does not require a number', macro, 'week', 7 * 86400000);
+test('understands seconds', macro, '1 second', 1000);
+test('understands minutes', macro, '1 minute', 60000);
+test('understands hours', macro, '1 hour', 3600000);
+test('understands days', macro, '1 day', 86400000);
+test('understands weeks', macro, '1 week', 7 * 86400000);
+test('understands months', macro, '1 month', 30 * 86400000);
+test('understands years', macro, '1 year', 31536000000);
+test('understands numbers', macro, '2 seconds', 2000);
+test('understands decimals', macro, '2.5 seconds', 2500);
+test('understands english numbers', macro, 'two seconds', 2000);
+test('works with mixed units', macro, '3 minutes and 30 seconds', 210000);
+test('works with mixed time expressions', macro, ['three minutes and 30 seconds', 'three minutes 30 seconds'], 210000);